Process for coating pretreated vulcanized articles of saturated

Details Process for coating pretreated vulcanized articles of saturated Process for coating pretreated vulcanized articles of saturated

1975-10-09

1977-05-17

Smith, Ronald H.

Stock material or miscellaneous articles

Composite

Of polyamidoester

427 54, 427322, 428500, 428523, B32B 2740

Patent

active

040243176

ABSTRACT:
Polyolefin rubber is coated with an isocyanate-curing varnish whose binder is a mixture of (a) a saturated oligoester resin containing hydroxyl groups and having a molecular weight of 250-3,500 and whose alcohol component is at least difunctional and 20-100 mole percent of which is 1,4-bis(hydroxymethyl)cyclohexane; and (b) a di- or poly-functional isocyanate or mixture thereof, wherein the ratio of isocyanate groups of the isocyanate to the hydroxyl groups of the oligoester resins is about 0.75 : 1 to 1 : 1, by pre-treating the vulcanized rubber article with a strong oxidizing agent or by irradiation with ultraviolet light.

REFERENCES:
patent: 2956961 (1960-10-01), Kibler et al.
patent: 3080255 (1963-03-01), Winkelmann
patent: 3214411 (1965-10-01), Saunder et al.
patent: 3547889 (1970-12-01), Schutze et al.
patent: 3600289 (1971-08-01), Bragole
patent: 3695918 (1972-10-01), Ward
Rubber World, "EPDM Breakthrough in Automotive Trim", Feb. 1972, pp. 31-35.

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